A control system for a vehicle includes an electronic control unit. The electronic control unit is configured to i) calculate a target supercharging pressure of an intake air such that, when an internal combustion engine is operated through the homogeneous charge compression ignition, the internal combustion engine achieves a required output while satisfying a predetermined requirement, ii) control an output of the internal combustion engine such that the output approaches the required output in accordance with an actual supercharging pressure in process of changing the actual supercharging pressure to the target supercharging pressure that is achieved by a supercharger, and iii) control a rotary machine such that an output of the rotary machine compensates for part or all of a differential output between the required output and the output in process of changing the actual supercharging pressure to the target supercharging pressure.

A speed change control system configured to allow a driver to promptly sense a response to an accelerating operation. A reference index value that the driver senses an acceleration response is calculated based on acceleration of a vehicle. If the reference index value is smaller than a first reference index value at which the driver is allowed to sense the acceleration response, a downshift point is lowered to a first drive force.

The control apparatus closes the throttle, opens the bypass valve and supplies electric power to the electric compressor in a case where the remaining battery power of the battery is larger than the reference level when regenerative braking is performed with the first motor generator. The electric compressor is provided on the intake passage upstream of the throttle. The bypass valve is provided on the bypass passage that bypasses the electric compressor. According to the hybrid vehicle configured as above, regenerative braking force to be required can be obtained by performing electric power regeneration using the generator even when there is a constraint on regenerated electric power that the battery can accept.

A vehicle having an engine, a starter-generator, and a controller is disclosed. The controller is configured to respond to an engine start command, operate the engine to produce excess torque beyond a demand torque, and in response to engine speed achieving a threshold, operate the starter-generator to load the engine to consume the excess torque and drive the engine speed toward an electric machine speed, and engage a clutch to couple the engine and an electric machine.

A method for reducing an exhaust gas of a mild hybrid system may include determining by an electronic control unit (ECU) whether an engine enters a full load region or a partial load region, based on a position of an accelerator pedal, controlling, by the ECU, the operation of an electric supercharger, based on information on an engine rotational frequency, when a vehicle is driven while being accelerated in a state in which the engine enters the full load region, and controlling, by the ECU, the operation of the electric supercharger by determining whether the vehicle is accelerated, based on an incremental slope of the position of the accelerator pedal, when the engine enters the partial load region.

According to the present invention, there is provided a control device for an internal combustion engine which includes a motor driving a WG valve (waste gate valve), and in which a target opening degree of the WG valve is set in accordance with a running state of an internal combustion engine and a valve opening degree of the WG valve is controlled by controlling electrification of the motor. While the internal combustion engine is starting or is running with the target opening degree set to a fully-closed opening degree, an electrification duty ratio of the motor is controlled such that the electrification duty ratio meets a predetermined value allowing the WG valve to be pressed to a fully-closed position, and electrification of the motor stops after the WG valve is driven to the fully-closed position while the internal combustion engine is in a stop state.

The present invention relates to a method and a system for adaptation of a vehicle's performance. This system comprises a receiving device arranged to receive a request that a driver of the vehicle wishes to use a temporary performance mode. The system also comprises a first initiation device arranged to initiate a use of a preparation mode based on the driver's request, where the vehicle, during such preparation mode, prepares the vehicle to use an increased fraction of the power, generated by the engine in the vehicle, for the propulsion of the vehicle. The system also comprises a second initiation device arranged to initiate a use of the temporary performance mode, wherein such temporary performance mode uses the increased fraction of the power generated, released by the preparation mode, to provide a temporary performance boost for at least one feature relating to the propulsion of the vehicle.

Methods and systems are provided for purging condensate from a charge air cooler towards an intake air filter. In one example, a method may include operating a motor to rotate an engine in reverse and flowing air from the intake manifold to the atmosphere via the charge air cooler to purge condensate towards an intake air filter.

Methods, systems, and apparatus for acceleration event prediction. A system includes one or more external databases connected through a network to a vehicle. The vehicle includes a navigation unit, one or more sensors and an electronic control unit coupled to at least the navigation unit and the one or more sensors. The electronic control unit is configured to obtain navigational map information and vehicle information, determine a predicted route set including a destination location based on the the navigational map information and the vehicle information, determine one or more predicted acceleration events for the predicted route set, detect a respective acceleration event of the one or more predicted acceleration events based on the predicted route set and a first location of the vehicle and send or transmit a signal to a turbocharger that is coupled to an engine to prepare for the respective acceleration event.

A method for controlling an internal combustion engine system so as to avoid turbo surge and/or shorten power cut off during gearshift is provided. The internal combustion engine system includes: an internal combustion engine and a gearbox operatively connected to the internal combustion engine; a turbocharging arrangement configured to provide a boost pressure of air fed to the internal combustion engine; and a control system configured to control operation of the internal combustion engine system, the method comprising: providing information about a point of time for initiating an upcoming gearshift, a target engine speed after the upcoming gearshift, iii) a target engine torque after the upcoming gearshift, and current operation conditions of the internal combustion engine system; determining, based on said information and before the upcoming gearshift is initiated, whether there is a risk of having turbo surge during the upcoming gearshift; and, if such a risk is determined, lowering the boost pressure before initiating the upcoming gearshift.